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With the rapid development of economy and urbanization, human beings are facing a great challenge of environmental pollution and energy shortage. To reduce energy consumption of HVAC in buildings, thermal insulation and air layers are often utilized to reduce heat transfer through the building envelope in Hot Summer and Cold Winter (HSCW) zone in China. To investigate heat transfer characteristics of external thermal insulation walls with air layers, a coupled heat and moisture transfer model of one-dimension wall was established. The relative humidity and temperature distribution of four types of envelope structures with air layers at three different interfaces or without air layers was simulated. The condensation and heat transfer characteristics were analysed, and the results show that the best arrangement configuration is provided by creating an air layer inside of the wall (Interface 3). The condensation and heat transfer characteristics of the wall are related. The more serious the condensation phenomenon is, the greater the heat transfer of the wall will be.
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Details
- Original title: Analysis of the arrangement and effects of air layer in external thermal insulation walls in hot summer and cold winter zone in China.
- Record ID : 30026119
- Languages: English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Publication date: 2019/08/24
- DOI: http://dx.doi.org/10.18462/iir.icr.2019.1508
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Indexing
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Themes:
Heat transfer;
Comfort air conditioning;
Insulants - Keywords: Winter; China; Building; Heat transfer; Simulation; Wall; Summer; Insulation; Air conditioning; Condensation
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